//****************************************************************************************** // PIC18F14K50 Sample Program // Project : // Program Name : // Programer : // Create date : Version 1.0 H23.07.10 // Replace date : // History : // Laungage : MPLAB C18 //****************************************************************************************** // Description // (1)OSC 48MHz (12MHz Crystal * PLL4) // (2)I/O PORT // PORTC(0) : DCM16117A(E) // PORTC(1) : DCM16117A(RS) // PORTC(7-4) : DCM16117A(DB7-4) // // PORTB(6) : GAS Senser(TGS2450) VH (8/250mS, 1.6V) // PORTB(4) : GAS Senser(TGS2450) VC (5/250mS) // PORTC(2)AN6 : GAS Senser(TGS2450) Output // // 254287,286391 //****************************************************************************************** #include #include #include #include #include #include #include #include // //Define configration // #pragma config CPUDIV=NOCLKDIV //CPU System Clock Selection bit(No CPU System Clock divide) #pragma config USBDIV = OFF //USB Clock Selection bit(USB Clock comes directly from the OSC1/OSC2 oscillator block; no divide) #pragma config FOSC = HS //Oscillator Selection bits(HS oscillator) #pragma config PLLEN = ON //X PLL Enable bit(Oscillator multiplied by 4) #pragma config PCLKEN = OFF //Primary Clock Enable Bit(Primary clock is under software control) #pragma config FCMEN = OFF #pragma config IESO = OFF //Internal/External Oscillator Switchover bit(Oscillator Switchover mode disabled) #pragma config PWRTEN = OFF,BOREN = OFF,BORV = 19 #pragma config WDTEN = OFF,WDTPS = 1 #pragma config MCLRE = OFF //MCLR Pin Enable bit(RE3 input pin enabled; MCLR disabled) #pragma config HFOFST = OFF,STVREN = OFF,LVP = OFF,BBSIZ = OFF,XINST = OFF #pragma config CP0 = OFF,CP1 = OFF,CPB = OFF,CPD = OFF,WRT0 = OFF,WRT1 = OFF,WRTB = OFF,WRTC = OFF,WRTD = OFF,EBTR0 = OFF,EBTR1 = OFF,EBTRB = OFF // //Define function // #define LCD_E 0 #define LCD_RS 1 #define LCD_DB4 4 #define LCD_DB5 5 #define LCD_DB6 6 #define LCD_DB7 7 #define TERM_0 0 #define TERM_1 1 #define TERM_2 2 #define TERM_VC 4 #define TERM_VH 6 #define PI_NORMAL 0 #define PI_FAILURE 1 #define PI_POS0 0 #define PI_POS1 1 #define PI_POSN 2 // // //Define function // void Demo01(void); void Init_POS0(void); void Init_POS1(void); void Init_LCD(void); void LCD_Disp(unsigned char); void LCD_CLR(void); void LCD_SETH(unsigned char); void LCD_SETL(unsigned char); void BCF(unsigned int); void BSF(unsigned int); void TERM_BCF(unsigned int); void TERM_BSF(unsigned int); void mnop(unsigned int); void Int_Timer1(void); void Timer0(void); void Timer3(void); void Wait_1mS(unsigned int); void Wait_1mS3(unsigned int); void Init_ADC(void); void GetADC(unsigned int *); void Prog01(void); void LCD_Disp_S(unsigned char *, unsigned char); void isr (void); volatile unsigned int G_int_counter=0; volatile unsigned int G_adc_data=0; #define DEF_VC 4400 // VC:4400mV #define DEF_RL 50000 // RL:50K void main(void) { // ************************************* // 1.Initialize Segment // ************************************* // (1)Define I/O port PORTA = 0b00000000; PORTB = 0b00000000; PORTC = 0b00000000; TRISA = 0b11111111; TRISB = 0b10101111; TRISC = 0b00001100; // (2)Select A/D Converter ANSEL = 0b00000000; //ALL Degital PORT ANSELH = 0b00000000; //ALL Degital PORT // (3)Initialized LCD Init_LCD(); // (4)Initialized A/D Converter Init_ADC(); // (5)Initialized Timer Int_Timer1(); // ************************************* // 2.Program Main // ************************************* // (1)Demo Program (Display Start-Message) Demo01(); // Output LCD // (2)Clear Display LCD_CLR(); // (3)Program main while(1){ Prog01(); } } //****************************************************************************************** // Function name : Demo01 // Title : // Input : // Output : //****************************************************************************************** void Demo01(void) { unsigned char msg[9]; // (1)Start message strcpypgm2ram(msg," Start P"); LCD_Disp_S(msg,PI_POS0); strcpypgm2ram(msg,"IC18F14 "); LCD_Disp_S(msg,PI_POS1); Wait_1mS(500); } //****************************************************************************************** // Function name : Prog01 // Title : // Input : // Output : // Description : -2,147,483,648 <= LONG(32bit) <= 2,147,483,647 //****************************************************************************************** void Prog01(void) { unsigned char tmp_line[10]; long l_adc; long l_rs; // 0.Title strcpypgm2ram(tmp_line," GAS: "); LCD_Disp_S(tmp_line,PI_POS0); // 1.Get A/D-data (G_adc_data) l_adc = G_adc_data ; l_adc = l_adc * 5000 / 1023 ; // 2.Edit data if(l_adc<1){ strcpypgm2ram(tmp_line,"********"); }else if(l_adc > DEF_VC){ strcpypgm2ram(tmp_line,"********"); }else{ l_rs = ((long)DEF_VC - l_adc ) * (long)DEF_RL / l_adc ; if(l_rs > 99999999){ strcpypgm2ram(tmp_line,"********"); }else{ sprintf(tmp_line, "%8ld",l_rs); } } // 3.Put data // (1)Put data LCD_Disp_S(tmp_line,PI_POS1); // (2)Wait 500mS Wait_1mS(500); } //****************************************************************************************** // Function Name : Init_ADC // Title : // Input : // Output : // Description : Analog Channel Select (RC2:AN6) //****************************************************************************************** void Init_ADC(void) { // ******************************************************* // 0.Define ANSEL(ANALOG SELECT REGISTER) and ANSELH(ANALOG SELECT REGISTER 2) // ANSEL[7] ANS7: RC3 Analog Select Control bit // 1 = Digital input buffer of RC3 is disabled // 0 = Digital input buffer of RC3 is enabled // ANSEL[6] ANS6: RC2 Analog Select Control bit // 1 = Digital input buffer of RC2 is disabled // 0 = Digital input buffer of RC2 is enabled // ANSEL[5] ANS5: RC1 Analog Select Control bit // 1 = Digital input buffer of RC1 is disabled // 0 = Digital input buffer of RC1 is enabled // ANSEL[4] ANS4: RC0 Analog Select Control bit // 1 = Digital input buffer of RC0 is disabled // 0 = Digital input buffer of RC0 is enabled // ANSEL[3] ANS3: RA4 Analog Select Control bit // 1 = Digital input buffer of RA4 is disabled // 0 = Digital input buffer of RA4 is enabled // ANSEL[2-0] Unimplemented: Read as ‘0’ // // ANSELH[7-4] Unimplemented: Read as ‘0’ // ANSELH[3] ANS11: RB5 Analog Select Control bit // 1 = Digital input buffer of RB5 is disabled // 0 = Digital input buffer of RB5 is enabled // ANSELH[2] ANS10: RB4 Analog Select Control bit // 1 = Digital input buffer of RB4 is disabled // 0 = Digital input buffer of RB4 is enabled // ANSELH[1] ANS9: RC7 Analog Select Control bit // 1 = Digital input buffer of RC7 is disabled // 0 = Digital input buffer of RC7 is enabled // ANSELH[0] ANS8: RC6 Analog Select Control bit // 1 = Digital input buffer of RC6 is disabled // 0 = Digital input buffer of RC6 is enabled // ******************************************************* ANSEL = 0b01000000; //Select ANS6 ANSELH = 0b00000000; // ******************************************************* // 1.Define ADCON0(A/D CONTROL REGISTER 0) Register // ADCON0(7-6) Unimplemented: Read as ‘0’ // ADCON0(5-2) CHS<3:0>: Analog Channel Select bits // 0000 = Reserved // 0001 = Reserved // 0010 = Reserved // 0011 = AN3 // 0100 = AN4 // 0101 = AN5 // 0110 = AN6 // 0111 = AN7 // 1000 = AN8 // 1001 = AN9 // 1010 = AN10 // 1011 = AN11 // 1100 = Reserved // 1101 = Reserved // 1110 = DAC // 1111 = FVR // ADCON0(1) GO/DONE: A/D Conversion Status bit // 1 = A/D conversion cycle in progress. Setting this bit starts an A/D conversion cycle. // This bit is automatically cleared by hardware when the A/D conversion has completed. // 0 = A/D conversion completed/not in progress // ADCON0(0) ADON: ADC Enable bit // 1 = ADC is enabled // 0 = ADC is disabled and consumes no operating current // ******************************************************* ADCON0 = 0b00011001; //Select AN6 // ******************************************************* // 2.Define ADCON1(A/D CONTROL REGISTER 1) Register // ADCON1(7-4) Unimplemented: Read as ‘0’ // ADCON1(3-2) PVCFG<1:0>: Positive Voltage Reference select bit // 00 = Positive voltage reference supplied internally by VDD. // 01 = Positive voltage reference supplied externally through VREF+ pin. // 10 = Positive voltage reference supplied internally through FVR. // 11 = Reserved. // ADCON1(1-0) NVCFG<1:0>: Negative Voltage Reference select bit // 00 = Positive voltage reference supplied internally by VSS. // 01 = Positive voltage reference supplied externally through VREF- pin. // 10 = Reserved. // 11 = Reserved. // ******************************************************* ADCON1 = 0b00000000; // ******************************************************* // 3.Define ADCON2(A/D CONTROL REGISTER 2) Register // ADCON2(7) ADFM: A/D Conversion Result Format Select bit // 1 = Right justified // 0 = Left justified // ADCON2(6) Unimplemented: Read as ‘0’ // ADCON2(5-3) ACQT<2:0>: A/D Acquisition time select bits. Acquisition time is the duration that the A/D charge // holding capacitor remains connected to A/D channel from the instant the GO/DONE bit is set until // conversions begins. // 000 = 0(1) // 001 = 2 TAD // 010 = 4 TAD // 011 = 6 TAD // 100 = 8 TAD // 101 = 12 TAD // 110 = 16 TAD // 111 = 20 TAD // ADCON2(2-0) ADCS<2:0>: A/D Conversion Clock Select bits // 000 = FOSC/2 // 001 = FOSC/8 // 010 = FOSC/32 // 011 = FRC(1) (clock derived from a dedicated internal oscillator = 600 kHz nominal) // 100 = FOSC/4 // 101 = FOSC/16 // 110 = FOSC/64 // 111 = FRC(1) (clock derived from a dedicated internal oscillator = 600 kHz nominal) // ******************************************************* // ADCON2 = 0b10001000; ADCON2 = 0b10111110; } //****************************************************************************************** // Function Name : GetADC // Title : // Input : // Output : // Description : //****************************************************************************************** void GetADC(unsigned int *adc_data) { unsigned char Dat_L,Dat_H; // ***************** // 1.Start ADC // ***************** // GO/DONE: A/D Conversion Status bit ADCON0 = ADCON0 | 0b00000010; // ***************** // 2.Get data // ***************** while((ADCON0 & 0b00000010)!=0); Dat_H = ADRESH; Dat_L = ADRESL; // ***************** // 3.Edit data // ***************** *adc_data = (unsigned int)Dat_H * (unsigned int)256 + (unsigned int)Dat_L; } //****************************************************************************************** // Function name : LCD_Disp_S // Title : // Input : // Output : //****************************************************************************************** void LCD_Disp_S(unsigned char in_str[], unsigned char flg) { unsigned int lp; unsigned int no; if(flg == PI_POS0){ Init_POS0(); }else if(flg == PI_POS1){ Init_POS1(); } no=strlen(in_str); for(lp=0;lp 0d12,000(Count) ==> 0x2EE0(Count) // TMR1 = 0xFFFF - 0x2EE0 ==> 0xD11F // TMR0H = 0xD1; TMR0L = 0x1F; // ******************************************************* // 3.Timer // ******************************************************* INTCONbits.TMR0IF = 0; while(1){ if(INTCONbits.TMR0IF != 0 )break; } } //****************************************************************************************** // Function Name : Timer3 ※Timer3 (OK) // Title : Wait 1[mS] // Input : // Output : //****************************************************************************************** void Timer3(void) { // ******************************************************* // 1.Define T3CON(TIMER3 CONTROL REGISTER) Register // T3CON(7) RD16: 16-bit Read/Write Mode Enable bit // 1 = Enables register Read/Write of Timer3 in one 16-bit operation // 0 = Enables register Read/Write of Timer3 in two 8-bit operations // T3CON(6) Unimplemented: Read as ‘0’ // T3CON(5-4) T3CKPS1:T3CKPS0: Timer3 Input Clock Prescale Select bits // 11 = 1:8 Prescale value // 10 = 1:4 Prescale value // 01 = 1:2 Prescale value // 00 = 1:1 Prescale value // T3CON(3) T3CCP1: Timer3 and Timer1 to CCP1 Enable bits // 1 = Timer3 is the clock source for compare/capture of ECCP1 // 0 = Timer1 is the clock source for compare/capture of ECCP1 // T3CON(2) T3SYNC: Timer3 External Clock Input Synchronization Control bit // (Not usable if the system clock comes from Timer1/Timer3) // When TMR3CS = 1: // 1 = Do not synchronize external clock input // 0 = Synchronize external clock input // When TMR3CS = 0: // This bit is ignored. Timer3 uses the internal clock when TMR3CS = 0. // T3CON(1) TMR3CS: Timer3 Clock Source Select bit // 1 = External clock input from Timer1 oscillator or T1CKI // (on the rising edge after the first falling edge) // 0 = Internal clock (FOSC/4) // T3CON(0) TMR3ON: Timer3 On bit // 1 = Enables Timer3 // 0 = Stops Timer3 // ******************************************************* T3CON = 0b10000001; //16bit // ******************************************************* // 2.Define TMR3 Register // ******************************************************* // TMR3 data ( OSC:12MHz, 4X PLLON, 1:1 Prescale value, 0.001[S];1000Hz ) // 1mS(1000Hz): 12MHz * 4(PLLON) / 4(PIC) / 1(Prescale) / 1000(1000Hz)==> 0d12,000(Count) ==> 0x2EE0(Count) // TMR1 = 0xFFFF - 0x2EE0 ==> 0xD11F // TMR3H = 0xD1; TMR3L = 0x1F; // ******************************************************* // 3.Timer // ******************************************************* PIR2bits.TMR3IF = 0; while(1){ if(PIR2bits.TMR3IF != 0 )break; } } //****************************************************************************************** // Function Name : Int_Timer1 ※Timer1 // Title : // Input : // Output : //****************************************************************************************** void Int_Timer1(void) { // ******************************************************* // 1.Define Interrupts // Timer1 interrupt, if enabled, is generated on overflow, which is latched in the TMR1IF // interrupt flag bit of the PIR1 register. This interrupt can be enabled or disabled // by setting or clearing the TMR1IE Interrupt Enable bit of the PIE1 register. // ******************************************************* // (1)Define INTCON(INTERRUPT CONTROL)Register // INTCON(7) GIE/GIEH(Global Interrupt Enable bit) // INTCON(6) PEIE/GIEL(Peripheral Interrupt Enable bit) // 1 = Enables, 0 = Disables INTCON = INTCON | 0b11000000; // (2)Define PIR1(PERIPHERAL INTERRUPT REQUEST)Register // PIR1(0) TMR1IF(TMR1 Overflow Interrupt Flag bit) // 1 = Enables, 0 = Disables PIR1 = PIR1 | 0b00000001; // (3)Define PIE1(PERIPHERAL INTERRUPT ENABLE)Register // PIE1(0) TMR1IE(TMR1 Overflow Interrupt Enable bit) // 1 = Enables, 0 = Disables PIE1 = PIE1 | 0b00000001; // (4)Define IPR1(PERIPHERAL INTERRUPT PRIORITY REGISTER 1) // IPR1(0) TMR1IP(TMR1 Overflow Interrupt Priority bit) // 1 = High priority, 0 = Low priority // IPR1 = IPR1 | 0b00000001; IPR1 = IPR1 | 0b00000000; // ******************************************************* // 2.Define T1CON(TIMER1 CONTROL REGISTER) Register //* T1CON(7) RD16: 16-bit Read/Write Mode Enable bit // 1 = Enables register read/write of TImer1 in one 16-bit operation // 0 = Enables register read/write of Timer1 in two 8-bit operations //* T1CON(6) T1RUN: Timer1 System Clock Status bit // 1 = Main system clock is derived from Timer1 oscillator // 0 = Main system clock is derived from another source //* T1CON(5-4)T1CKPS<1:0>: Timer1 Input Clock Prescale Select bits // 11 = 1:8 Prescale value // 10 = 1:4 Prescale value // 01 = 1:2 Prescale value // 00 = 1:1 Prescale value //* T1CON(3) T1OSCEN: Timer1 Oscillator Enable bit // 1 = Timer1 oscillator is enabled // 0 = Timer1 oscillator is shut off // The oscillator inverter and feedback resistor are turned off to eliminate power drain. //* T1CON(2) T1SYNC: Timer1 External Clock Input Synchronization Select bit // When TMR1CS = 1: // 1 = Do not synchronize external clock input // 0 = Synchronize external clock input // When TMR1CS = 0: // This bit is ignored. Timer1 uses the internal clock when TMR1CS = 0. //* T1CON(1) TMR1CS: Timer1 Clock Source Select bit // 1 = External clock from the T13CKI pin (on the rising edge) // 0 = Internal clock (FOSC/4) //* T1CON(0) TMR1ON: Timer1 On bit // 1 = Enables Timer1 // 0 = Stops Timer1 // ******************************************************* T1CON = 0b10110001; // 16-bit Read/Write Mode, 1:8 Prescale value // ******************************************************* // 3.Define TMR1 Register // Caution(16-bit Read/Write Mode) !!!!: // (a)Writing to TMR1H does not directly affect Timer1. // Instead, the high byte of Timer1 is updated with the contents of TMR1H when a write occurs to TMR1L. // This allows all 16 bits of Timer1 to be updated at once. // (b)A read from TMR1L will load the contents of the high byte of Timer1 into the Timer1 high byte buffer. // This provides the user with the ability to accurately read all 16 bits of Timer1 without the need to // determine whether a read of the high byte, followed by a read of the low byte, has become invalid due // to a rollover or carry between reads. // ******************************************************* // TMR1 data ( OSC:12MHz, 4X PLLON, 1:1 Prescale value, 0.0250[S];40Hz ) // 1mS(1000Hz): 12MHz * 4(PLLON) / 4(PIC) / 8(Prescale) / 40(0.0250[S])==> 0d37,500(Count) ==> 0x927C(Count) // TMR1 = 0xFFFF - 0x927C ==> 0x6D83 // TMR1 data ( OSC:12MHz, 4X PLLON, 1:1 Prescale value, 0.0242[S];41.3Hz ) // 1mS(1000Hz): 12MHz * 4(PLLON) / 4(PIC) / 8(Prescale) / 41.3(0.0242[S])==> 0d36,320(Count) ==> 0x8DE0(Count) // TMR1 = 0xFFFF - 0x8DE0 ==> 0x721F // TMR1H = 0x6D; TMR1L = 0x83; } //****************************************************************************************** // Function Name : isr // Title : interrupt // Input : // Output : //****************************************************************************************** #pragma code Int_addr=0x8 void Int_function (void) { _asm GOTO isr _endasm } #pragma code #pragma interruptlow isr void isr (void) { // ******************* // 1. < 0.25[mS] 4Hz // ******************* if(G_int_counter < 9){ // (1)Set timer TMR1H = 0x6D; TMR1L = 0x83; PIR1bits.TMR1IF = 0; G_int_counter++; }else{ // ******************* // 2. = 0.25[mS] 4Hz // ******************* // (1)Set timer TMR1H = 0x6D; // 25mS - 8mS TMR1L = 0x83; // PIR1bits.TMR1IF = 0; G_int_counter = 0; // (2)Set timer TERM_BSF(TERM_VC); TERM_BSF(TERM_VH); Wait_1mS3(5); // 5mS GetADC(&G_adc_data); TERM_BCF(TERM_VC); Wait_1mS3(3); // 3mS TERM_BCF(TERM_VH); } }